MARCS (Multi-Agency Radio Communications System) is a statewide Motorola Type II SmartZone OmniLink trunking system, utilizing APCO-25 Common Air Interface Exclusive voice. Users include the Ohio State Highway Patrol (OSP) (OH), the Ohio Department of Health, the Ohio EMA, the Ohio Department of Natural Resources, the Ohio Department of Rehabilitation and Corrections, and numerous city, county, and private agencies.